The printed template has instructions, but it may be easier to follow along with this video.

Tips:

Thicker stock paper is better if your printer can handle it.

It's hard to fit long words (or URLs) into the card, so reconsider your multisyllabic tendencies.

Using PaperTweets to propose to or dump an intimate partner is probably not a good idea.

This project was originally created for 10k EventApart where all entries must be under 10kb (10,000 bytes). That makes the use of images very difficult, so graphical elements like the bird are drawn dynamically in the <canvas>.

The original contest version is here, just fitting within the 10k limit. This updated version has a few tiny additions: I added a bit of extra code for the 3D CSS transforms (if you're WebKit enabled), hopefully improved the UX a bit with clearer intructions, and slipped in two little images for shadows.

The app talks to both Twitter and colourLovers.com, a wonderful community that openly shares its love of color (or colour). Check out their tools. And finally, nice to meet you, my name is Jonah or @jgmakes.

Cut out the card and the bird

Fold the card in half along the dotted line. It's easiest to first do it with the printed side facing out.

There are two dotted lines coming from the folded edge. Cut along them. It should create a little flap.

Now fold the card so the printed side background is on the inside.

Take that flap and fold it in the opposite direction, so that it folds into the closing card. Give it a good crease. This will make the bird "pop" when the card opens.

Take a small piece of tape and attach the bird to the bottom, front of the this flap.

When you open and close your card, the bird should pop up. If it doesn't, call your local Senator.